<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addFn">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item,id) in list" :key="id">
          <td>{{ item.id }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="delFn(id)">删除</button>
            <button @click="writFn(id)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      name: "",
      age: "",
      sex: "",
      Id: "",
      change: true,
      list: [
        {
          id: 1,
          name: "Tom",
          age: 19,
          sex: "男",
        },
        {
          id: 2,
          name: "Jone",
          age: 21,
          sex: "女",
        },
        {
          id: 3,
          name: "小李",
          age: 18,
          sex: "男",
        },
      ],
    };
  },
  methods: {
    addFn() {
      if (this.name === "" || this.age === "" || this.sex === "") {
        alert("请您输入正确的内容");
        return;
      }
      if (this.change === false) {
        this.list.splice(this.Id, 1, {
          id:this.list[this.Id].id,
          name: this.name,
          age: this.age,
          sex: this.sex,
        });
        (this.name = ""), (this.age = ""), (this.sex = "");
        this.change = true;
        return;
      } else {
        this.list.push({
          id: this.list.length ? this.list.at(-1).id + 1 : 1,
          name: this.name,
          age: this.age,
          sex: this.sex,
        });
        (this.name = ""), (this.age = ""), (this.sex = "");
      }
    },
    writFn(id) {
      (this.name = this.list[id].name),
        (this.age = this.list[id].age),
        (this.sex = this.list[id].sex),
        (this.change = false),
        (this.Id = id);
    },
    delFn(id){
      this.list.splice(id, 1);
    }
  },
};
</script>
